Rockwell Automation 2364P Parallel DC Bus Supply Config. - Manual (Page 185)

Publication 2364P-5.01 December 1999
Installation 15-13
Terminal Blocks
Figure 15.12
Customer Connections–TB1 and TB2 (NRUs and RGUs)
Table 15.A: Customer Connections–TB1 and TB2 (NRUs and RGUs)
C usto m er
Co ntro ls
Fau lt R elay (C R2)
T B2
T B1
1
2
1
2
1
2
1
2
3
4
3
4
5
6
5
6
7
8
7
8
9
10
9
10
150-3 00 Ω
Pow er T ran sform er
G rou nd ed -W ye S econ dary
P hase-Loss R elay (CR 1)
10
12
2
4
G rou nd -Fault Detec tion
O ption (VM 2)
1 15V A C From PT1
1 15V A C To Con trol Circu itry
C usto m er
Co ntro ls
1 15V A C From PT1
Fault R elay (C R 2)
U n it-N ot-Fau lted Pilot Lig ht (P L2 )
1 15V AC
Custo m e r
Device s
C ustom er
M onito ring
D evice
C ustom er
M onito ring
D evice
C ustom er
M onito ring
D evice
(NRU s O nly)
Terminals Description
TB1-1, TB1-2 These terminals are jumpered to allow the Fault Relay (CR2) and the Unit-Not-Faulted Pilot Light (PL2) to operate. The jumper
may be replaced with a customer control to externally cut the 115V AC power from the pilot light and fault relay coil.
TB1-3, TB1-4 These terminals connect to the normally-closed contacts on the Phase-Loss Relay (CR1) in the NRU. During normal operation,
these contacts will be open. These terminals may be wired to a customer monitoring device to indicate undervoltage, phase
unbalance, phase loss, and phase reversal conditions in the AC line. For more information on the phase-loss relay, or other wiring
configurations, see the internal wiring section of this chapter.
TB1-5, TB1-6 These terminals connect to the normally-open contacts on the Fault Relay (CR2). During normal operation, these contacts will be
closed. These terminals may be wired to a customer monitoring device to indicate overtemperature, phase-loss, and airflow
conditions. See the fault relay circuitry in the unit schematics for more details.
TB1-7, TB1-8 These terminals connect to the normally-closed contacts on the Ground-Fault Detection Option (VM2). During normal operation,
these contacts will be closed. These terminals may be wired to a customer monitoring device to indicate ground fault conditions.
For more information on the ground-fault detector, or other wiring configurations, see the internal wiring section of this chapter.
TB1-9, TB1-10 These terminals are jumpered to allow the 115V AC power to reach the control circuitry. Opening this circuit will cut power to the
control circuitry (which, in an RGU, will cause the power circuitry to trip open). The jumper may be replaced with a customer
control to externally cut power to the control circuitry.
TB2-1, TB2-2 These terminals connect to the relay coil of the Ground-Fault Detection Option (VM2). If the option is selected, these terminals
should be wired across the grounding resistor of the power transformer.